新概念英语2册21课ppt课件.ppt

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1、Lesson 21Mad or not?,New words and expressions生词和短语,mad adj 发疯的,mad adj 发疯的,1.sb.is mad 2.“为而疯狂（着迷）”的表示方法：be mad about Im mad about English.be crazy aboutgo insane（insane adj.患精神病的，精神病患者的，极愚蠢的）go bananas（go+adj.变得)They are going bananas.=going crazy=going mad(变疯了)I slowly go insane/go crazy/go mad/g

2、o bananas.3.be mad at sb 生某人的气,reason n.原因,for this reason 由于这个原因For this reason,I was late.由于这个原因，我迟到了。For what reason?是为了什麽原因？bring sb.to reason 使某人讲理,sum n.量,a large sum of:大量的，喜欢跟钱连用一大笔钱a large sum of money,sum n.量,plenty of，a lot of，lots of，a quantity of，quantities of，a supply of,supplies of,a

3、mass of,masses of可与可数名词和不可数名词连用 a number of，a variety of,varieties of,a good/great many,a great number of 后接可数名词复数a good/great many of 后面的名词复数前要有the/these/those/ones a great amount of，amounts of，a great/good deal of 后接不可数名词 a(large)sum of 修饰货币,determined adj 坚定的，下决心的,be determined to do sth.下决心做某事 表

4、示下决心做某事，句型知多少？make up ones mind to do sthdecide to do sthmake a decision to do sth,Listening Comprehension,课文讲解,Mad or not?,1、Mad or not?=mad or not mad?or not 在疑问词的后面，表示“是还不是”，选择概念,2、Aeroplanes are slowly driving me mad.1).aeroplane=airplane 飞机 2).drive sb mad 把某人逼疯（难点P94)e.g.You are driving me mad

5、.e.g.The teacher is slowly driving me mad.drive drove driven 开车drive into 赶进drive back 撵回drive out of 把赶出去,3、I live near an airport and passing planes can be heard night and day.night and day 日日夜夜，夜以继日 passing planes 过往飞机（passing是现在分词，作定语，起形容词作用，修饰planes，“经过的(路过)，过往的”）He forgot the man with passing

6、time.随着时间的消逝，他忘掉了那个人。sleeping baby 正在睡觉的小孩 waiting car 正在等待的车,4、The airport was built years ago,but for some reason it could not be used then.1)years前面不加确定的数词时，一般表示“许多年”years ago=many years ago，weeks等的用法与它相似 I have not seen him for weeks.,2)for some reason由于某个理由 some+可数名词单数：某一 some book some+可数名词复数：

7、一些 some books some+不可数名词：一些 some water Ill tell you some day.Well talk about it some other time.我们改日再谈这件事。,5.Last year,however,it came into use.Over a hundred people must have been driven away from their homes by the noise.1)come into use:投入使用 come into:进入得到、获得财富 e.g.They put this method into use.e.

8、g.This method comes into use.e.g.This method is put into use.2)over=more than3)away from 离开4)Home,family与 house 的区别（P94难点）home:家,强调有感情;house仅仅指房子;family:家人 home=family+house,6.I am one of the few people left.Sometimes I think this house will be knocked down by a passing plane.I have been offered a l

9、arge sum of money to go away,but I am determined to stay here.1).one of 的用法（3点）+名词复数+谓语动词的单数+形容词的最高,2）left表示被留下来的，leave过去分词,left作定语后置 left 剩下的东西，相当于“Who are left(by the others)其他人走了留下他们”I have a bag left.There is ten cents left in my pocket.（cent sent n.(货币单位)分,分币）,3）knock down 拆散，撞倒 offer v.提供（相当于g

10、iven）双宾语的被动语态中，主语有两种可能;以sb.做主语或以 sth.做主语give sb.sth.被动sb.be given sth.give sth.to sb.被动 sth.be given to sb.双宾语在变被动时用离动词最近的宾语做主语原文句型结构 sb.be offered sth.,7.Everybody says I must be mad and they are probably right.1）Everybody不定代词作主语谓语动词用单数2）must be 表对现在事实的肯定推测,Summary writing,1.Is the writer slowly go

11、ing mad or not?2.Where does he live?3.What can be heard night and day?4.Have most of his neighbours left their homes or not?5.Has he been offered money to leave or not?6.What is he determined to do?7.What does everyone say?8.Are they probably right or wrong?,Summary writing 摘要写作1.The writer is slowl

12、y going mad.2.He lives near an airport.3.Passing planes can be heard night and day.4.Most of his neighbours have left their homes.5.He has been offered money to leave.6.He determined to stay here.7.Everyone says he must be mad.8.They are probably right.,动词语态英语动词有两种语态主动语态：主语是动作的执行者被动语态：主语是动作的承受者Many

13、people speak English.(主动语态)English is spoken by many people.(被动语态),模仿上列句子连词成句,Silk,produce,in Hangzhou.Cars,make,in Tianjin.tea,grow,in Fujian.English,speak,in Australia.Glass,produce,in Germany.Ships,make,in Japan.,被动语态构成,助动词+及物动词的过去分词（be+P.P.),以see为例，比较主动语和态被动语态的结构形式,含有情态动词的被动式,1.He will repair yo

14、ur watch.Your watch will be repaired.2.He can repair your watch.Your watch can be repaired.3.They must test this new car.This new car must be tested.4.You have to write this letter again.This letter has to be written again.,剩余例子请参考课本p.93,肯定句，否定句及疑问句如下。,Cars are made in Changchun.Cars are not made in

15、 Changchun.-Are cars made in Changchun?(-Yes,they are./No,they arent.)Where are cars made?p26,被动语态使用方法,When can we use the passive voice?不知道动作的执行者是谁，或没有必要指出动作的执行者时。My bike was stolen last night.Letters are collected at eight every morning.2.为了强调或突出动作的承受者时。The desk was made by Master Wang.The bag was

16、 taken away by his sister.,3.为了更好地安排句子The well-known person got on the bus and was immediately recognized by people.（一个主语就够了）4.在上下文中，为了使句子间连接紧密时。如：I have a new skirt.It was given to me as a birthday present by my aunt.,主动语态改为被动语态的方法,将主动语态的宾语改为被动语态的主语。将主动语态的谓语动词改为“be+过去分词”结构。将主动语态的主语改为介词 by之后的宾语，放在谓语

17、动词之后（有时可省略）。,将下列句子改成被动语态。,1.We use English as a foreign language.English is used as a foreign language(by us)2.People write business letters in English Business letters are written(by people)in English.3.They make telephone calls in English.Telephone calls are made(by them)in English.4.Travelers and

18、 business people use English.English is used by travelers and business.5.Farmers grow rice in Zhejiang.Rice is grown by farmers in Zhejiang,主动语态变为被动语态时注意,含直接宾语和间接宾语的主动语态变为被动语态时有两种情况:Eg He gave the boy an apple.(1)把间接宾语改为主语,直接宾语保留不变:The boy was given an apple(2)把直接宾语改为主语,此时,间接宾语前要 加to或for.An apple wa

19、s given to the boy.(give,pass,show,send-to)(buy,draw,make,-for),1.含双宾语的被动My father gave me a new book on my birthday.-A new book was given to me(by my father)-I was given a new book(by my father).2.不带的to不定式,改为被动语态时不定式前要加to.They watched the children sing.The children were watched to sing.3.短语动词是不可分割的

20、整体,改为被动语态时要保持其完整性,介词或副词不可遗漏.We must take good care of the young trees.Young trees must be taken good care of.,4.带复合宾语的动词改为被动语态时,一般把主动语态的宾语改为主语,宾语补足语在被动语态中作主语补足语.He cut his hair short.His hair was cut short.They told him to help me.He was told to help me.5.注意:不及物动词不能用被动语态happen,take place,appearbut不及物动词带上介词或副词构成的短语,相当于及物动词,后面可带宾语,Homework,1.Recite the new words2.Recite the text3.Do the exercises,